Abstract

A polyelectrolyte complex (PEC) made up of poly(di-allyl di-methylammonium chloride) and poly(styrene sulphonate) polyelectrolytes has been synthesised and used for the immobilisation of phosphomolybdate (PMo), \( \left[ {{\text{PMo}}_{12} {\text{O}}_{40} } \right]^{ 3- } \) nanoclusters. The material is characterised by FTIR, powder XRD, SEM, TEM and UV-Visible DRS spectroscopy. It was found that the PMo clusters are intact in the hybrid and are present as nanoaggregates within the layers of PEC. The amount of PMo present in the hybrid is estimated from thermal measurements and the optical band gap energy of the material is found to be in the semiconductor region. The presence of negatively charged PMo clusters helped in almost complete adsorption of cationic dyes, methylene blue and rhodamine B. The PMo/PEC hybrid has shown to follow Langmuir adsorption isotherm in case of both the dye molecules.

Graphic abstract

Polyelectrolyte complex immobilised with Keggin-type phosphomolybdate ions showing efficient adsorption of Methylene Blue and Rhodamine B dye molecules.

中文翻译：

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固定在聚电解质基质上的磷钼酸盐纳米簇对阳离子染料的吸附

摘要

合成了由聚二烯丙基二甲基氯化铵和聚苯乙烯磺酸盐聚电解质组成的聚电解质复合物（PEC），并将其用于固定磷钼酸盐（PMo），\（\ left [{{{text { PMo}} _ {12} {\ text {O}} _ {40}} \ right] ^ {3-} \）纳米团簇。该材料通过FTIR，粉末XRD，SEM，TEM和UV-可见DRS光谱进行表征。已发现PMo团簇在杂种中是完整的，并以纳米团聚体的形式存在于PEC层中。混合材料中存在的PMo量是根据热测量估算得出的，材料的光带隙能量位于半导体区域中。带负电的PMo团簇的存在有助于阳离子染料，亚甲基蓝和若丹明B的几乎完全吸附。在这两种染料分子的情况下，PMo / PEC杂化物都遵循Langmuir吸附等温线。

图形摘要

固定有Keggin型磷钼酸根离子的聚电解质复合物显示出对亚甲基蓝和若丹明B染料分子的有效吸附。